【摘要】 以灰岩质粗粒土为研究对象,在95%压实度和最优含水率下进行不同粗粒含量的侧限压缩试验。通过分析P₅含量与P_2-5含量与沉降量、压缩模量、孔隙比的关系曲线来研究P₅含量和P_2-5含量对工程特性的影响。结果发现:在P₅含量小于55%时,压缩模量随P₅含量的增加缓慢增加,孔隙比随P₅含量的增加逐渐减小;当P₅含量介于55%和80%之间时,压缩模量随P₅含量的增加迅速增大,而孔隙比几乎不随P₅含量变化;当P₅含量大于80%时,压缩模量随P₅含量的增加而变化不大,孔隙比随P₅含量增加迅速增大;当P₅含量介于60%～70%,且P₅含量不变时,随着P_2-5含量增加,使得骨架效应增强,Es呈现明显增大现象。P₅含量在一定范围内对灰岩质粗粒土的工程特性起主导作用。更多还原

【Abstract】 Taking the coarse-grained limestone soil as the research object, this paper carries out the confined compression test for limestone soil with different coarse-grain content under 95% compaction and optimal moisture content, and studies the effects of P₅ content and P_2-5 content on engineering characteristics by analyzing the relationship curve between P₅ content and P_2-5 content and sedimentation, compression modulus and void ratio. The results show that: when the P₅ content is less than 55%, the compression modulus increases slowly and the void ratio decreases with the increase of P₅ content; when the P₅ content is between 55% and 80%, the compression modulus increases rapidly and the void ratio almost doesn’t change with the increase of P₅ content; when P₅ content is more than 80%, the compression modulus changes slightly and the void ratio increases rapidly with the increase of P₅ content; with the increase of P_2-5 content, the skeleton effect is enhanced and Esis obviously increased when P₅ content is constant between 60% and70%. The P₅ content plays a leading role in the engineering characteristics of coarse-grained limestone soil within a certain range.更多还原